123 строки
3.7 KiB
C
123 строки
3.7 KiB
C
// SPDX-License-Identifier: MIT
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// Copyright © 2014 Intel Corporation
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#ifndef _DRM_AUDIO_COMPONENT_H_
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#define _DRM_AUDIO_COMPONENT_H_
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struct drm_audio_component;
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struct device;
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/**
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* struct drm_audio_component_ops - Ops implemented by DRM driver, called by hda driver
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*/
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struct drm_audio_component_ops {
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/**
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* @owner: drm module to pin down
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*/
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struct module *owner;
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/**
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* @get_power: get the POWER_DOMAIN_AUDIO power well
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*
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* Request the power well to be turned on.
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*
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* Returns a wakeref cookie to be passed back to the corresponding
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* call to @put_power.
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*/
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unsigned long (*get_power)(struct device *);
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/**
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* @put_power: put the POWER_DOMAIN_AUDIO power well
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*
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* Allow the power well to be turned off.
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*/
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void (*put_power)(struct device *, unsigned long);
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/**
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* @codec_wake_override: Enable/disable codec wake signal
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*/
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void (*codec_wake_override)(struct device *, bool enable);
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/**
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* @get_cdclk_freq: Get the Core Display Clock in kHz
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*/
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int (*get_cdclk_freq)(struct device *);
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/**
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* @sync_audio_rate: set n/cts based on the sample rate
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*
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* Called from audio driver. After audio driver sets the
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* sample rate, it will call this function to set n/cts
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*/
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int (*sync_audio_rate)(struct device *, int port, int pipe, int rate);
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/**
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* @get_eld: fill the audio state and ELD bytes for the given port
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*
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* Called from audio driver to get the HDMI/DP audio state of the given
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* digital port, and also fetch ELD bytes to the given pointer.
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*
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* It returns the byte size of the original ELD (not the actually
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* copied size), zero for an invalid ELD, or a negative error code.
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*
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* Note that the returned size may be over @max_bytes. Then it
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* implies that only a part of ELD has been copied to the buffer.
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*/
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int (*get_eld)(struct device *, int port, int pipe, bool *enabled,
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unsigned char *buf, int max_bytes);
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};
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/**
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* struct drm_audio_component_audio_ops - Ops implemented by hda driver, called by DRM driver
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*/
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struct drm_audio_component_audio_ops {
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/**
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* @audio_ptr: Pointer to be used in call to pin_eld_notify
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*/
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void *audio_ptr;
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/**
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* @pin_eld_notify: Notify the HDA driver that pin sense and/or ELD information has changed
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*
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* Called when the DRM driver has set up audio pipeline or has just
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* begun to tear it down. This allows the HDA driver to update its
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* status accordingly (even when the HDA controller is in power save
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* mode).
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*/
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void (*pin_eld_notify)(void *audio_ptr, int port, int pipe);
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/**
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* @pin2port: Check and convert from pin node to port number
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*
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* Called by HDA driver to check and convert from the pin widget node
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* number to a port number in the graphics side.
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*/
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int (*pin2port)(void *audio_ptr, int pin);
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/**
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* @master_bind: (Optional) component master bind callback
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*
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* Called at binding master component, for HDA codec-specific
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* handling of dynamic binding.
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*/
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int (*master_bind)(struct device *dev, struct drm_audio_component *);
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/**
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* @master_unbind: (Optional) component master unbind callback
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*
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* Called at unbinding master component, for HDA codec-specific
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* handling of dynamic unbinding.
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*/
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void (*master_unbind)(struct device *dev, struct drm_audio_component *);
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};
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/**
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* struct drm_audio_component - Used for direct communication between DRM and hda drivers
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*/
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struct drm_audio_component {
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/**
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* @dev: DRM device, used as parameter for ops
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*/
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struct device *dev;
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/**
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* @ops: Ops implemented by DRM driver, called by hda driver
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*/
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const struct drm_audio_component_ops *ops;
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/**
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* @audio_ops: Ops implemented by hda driver, called by DRM driver
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*/
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const struct drm_audio_component_audio_ops *audio_ops;
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};
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#endif /* _DRM_AUDIO_COMPONENT_H_ */
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